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Dynamic viscoelastic properties of main-chain thermotropic liquid crystalline copolymers random copolyesters (PHB/PET) at different temperatures have been investigated. The form of the viscoelastic functions depends on both temperature and the composition ratio of copolymers. It was cleared that in certain temperature region, the viscoelastic behaviors for random copolyesters with optimum composition ratio were quite similar to those for a lyotropic polymer liquid crystals of PBG.
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Yanase et al. (1987) studied this question.
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